Choose the Answer That Best Describes the Movement of Molecules

question 59

Multiple Choice

Choose the answer that best describes the movement of molecules by symporters and antiporters.

• A) In both symporters and antiporters one molecule is moving down the gradient and the other molecule is moving against the gradient.
• B) In symporters, both molecules move in the same direction and against their gradient.
• C) In antiporters the molecules move in the opposite direction and both move down their gradient.
• D) Symporters move two molecules in opposite directions and antiporters move two molecules in the same direction.

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Definitions:

Neurotransmitters

Chemical substances that transmit signals across a synapse from one neuron to another in the brain and nervous system.

Synaptic Cleft

The narrow space between the terminal button of a neuron and the dendrite or cell body of another neuron where neurotransmitters are released.

Inhibitory Postsynaptic

Referring to a postsynaptic potential that makes a neuron less likely to generate an action potential, essentially serving to inhibit neuronal firing.

Neuron

A nerve cell that is the basic building block of the nervous system, responsible for receiving and transmitting information through electrical and chemical signals.